php - Do I need to use mysql_real_escape_string on all form inputs? -

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i know need use them on user input fields such username entry field, radio buttons such gender option?

stop!

you seem confusing escaping data validation , data sanitization.

you need validate data comes in. yes, means making sure radio buttons contain legal values.

you need sanitize data comes in. should text field contain html? no? strip_tags. should field number? cast integer.

you need escape data place in database. if you're still using prehistoric "mysql" extension, means using mysql_real_escape_string on as build query -- not before.

you need escape data echo user. htmlspecialchars friend.

i've explained in more detail, though not duplicate question.


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